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9th Class Physics Chapter 3 Dynamics English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

The force which keeps a body to move in a circle is called

Choose an answer

Gravitational force

Centripetal force

Centrifugal force

Rotational force

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Question # 2

Rocket works on principle of ______________

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Action Reaction

Law of inertia

Mass energy

Nil

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Question # 3

A boy jumps out of a moving bus. There is danger for him to fall

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Towards the moving bus

In the direction of motion

away from the bus

Opposite to the direction of motion

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Question # 4

A body jumps out of a moving bus. There is a danger for him to fall:

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Towards the moving bus

Away form the bus

In the direction of motion

opposite to the direction of motion

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Question # 5

Newton related inertia of the body with its

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Weight

Mass

Density

Force

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Question # 6

How much force is needed to body of mass 10 kg from falling:

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100 N

150 N

200 N

300 N

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Question # 7

If a 20 N wight of block hang with the string vertically then tension in string is:

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0 N

20 N

2 N

10 N

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Question # 8

All divers need to wear seat belt because of effect of:

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Inertia

Gravity

Car force

Nil

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Question # 9

Weight is measured by:

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Spring balnce

Measuring cylinder

Physical balnce

None of these

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Question # 10

The force which opposes the motion is called.

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Momentum

Friction

Inertia

Tension

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Question # 11

When a force of 4 Newton is applied on a body of mass 2 kg, the acceleration produced in it will be:

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2 ms^-2

4 ms^-2

8 ms^-2

6 ms^-2

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Question # 12

Centripetal force always acts _________ to the motion:

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Opposite

Parallel

Perpendicular

Upward

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Question # 13

Action and Reaction are always on:

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Same body

Different bodies

Any body

None of these

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